12544699668040 has 32 divisors (see below), whose sum is σ = 28262088649080. Its totient is φ = 5011388419072.

The previous prime is 12544699668029. The next prime is 12544699668047. The reversal of 12544699668040 is 4086699644521.

It can be written as a sum of positive squares in 4 ways, for example, as 3205038028644 + 9339661639396 = 1790262^2 + 3056086^2 .

It is a super-2 number, since 2×12544699668040² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12544699668047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202826449 + ... + 202888288.

Almost surely, 2^{12544699668040} is an apocalyptic number.

12544699668040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12544699668040 is an abundant number, since it is smaller than the sum of its proper divisors (15717388981040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12544699668040 is a wasteful number, since it uses less digits than its factorization.

12544699668040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405715521 (or 405715517 counting only the distinct ones).

The product of its (nonzero) digits is 89579520, while the sum is 64.

The spelling of 12544699668040 in words is "twelve trillion, five hundred forty-four billion, six hundred ninety-nine million, six hundred sixty-eight thousand, forty".